Pyxis SP-710 User manual

Brand: Pyxis

Model: SP-710

Category: Measuring, testing & control

Type: User manual

SP-710 User Manual [email protected] | +1 (866) 203-8397 1

SP-710 Water Mulmeter

User Manual

January 14, 2021

Rev. 3.02

Pyxis Lab, Inc.

1729 Majesc Dr. Suite 5

Lafayee, CO 80026 USA

www.pyxis-lab.com

Pyxis Lab Proprietary and Condenal

Table of Contents

1 Introducon 3

1.1 Main Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Specicaons 4

3 Unpacking Instrument 4

3.1 Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Oponal Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Installaon 5

4.1 Main Module Baery Installaon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.2 pH/ORP Module Baery Installaon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Instrument Overview 7

5.1 pH/ORP Cell Dual-Funcon Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.2 Control Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.3 Main Module On/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.4 pH/ORP Module On/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Measurement 9

6.1 PTSA and Conducvity Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6.2 TMB Free and Total Chlorine Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.3 Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6.4 pH/ORP Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7 Calibraon 15

7.1 PTSA Calibraon (Two-Point with Zero) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7.2 Combined PTSA and Conducvity Calibraon . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

7.3 Conducvity Calibraon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7.4 TMB Free and Total Chlorine Calibraon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.5 pH Calibraon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7.6 ORP Calibraon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

8 Device Informaon and Diagnosis 28

8.1 Main Module Sample Cell Cleanliness Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8.2 Bluetooth Connecon to Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8.3 Factory Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9 Use with uPyxis® Mobile App 33

9.1 Download uPyxis® Mobile App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

9.2 Connecng to uPyxis® Mobile App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9.3 System Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

9.4 Seng Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9.5 Datalog Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

10 Use with uPyxis® Desktop App 37

10.1 Install uPyxis® Desktop App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

10.2 Connecng to uPyxis® Desktop App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

10.3 System Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

10.4 Seng Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

10.5 Datalog Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

11 Device Maintenance and Precauon 41

11.1 Maintenance Best Pracces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

11.2 Methods to Cleaning the SP-710 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

11.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

11.4 pH/ORP Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

12 Regulatory Approval 45

13 Contact Us 45

SP-710 User Manual [email protected] | +1 (866) 203-8397 1

Warranty Informaon

Condenality

The informaon contained in this manual may be condenal and proprietary and is the property of Pyxis

Lab, Inc. Informaon disclosed herein shall not be used to manufacture, construct, or otherwise reproduce

the goods described. Informaon disclosed herein shall not be disclosed to others or made public in any

manner without the express wrien consent of Pyxis Lab, Inc.

Standard Limited Warranty

Pyxis Lab warrants its products for defects in materials and workmanship. Pyxis Lab will, at its opon, repair

or replace instrument components that prove to be defecve with new or remanufactured components

(i.e., equivalent to new). The warranty set forth is exclusive and no other warranty, whether wrien or oral,

is expressed or implied.

Warranty Term

The Pyxis warranty term is thirteen (13) months ex-works. In no event shall the standard limited warranty

coverage extend beyond thirteen (13) months from original shipment date.

Warranty Service

Damaged or dysfunconal instruments may be returned to Pyxis for repair or replacement. In some in-

stances, replacement instruments may be available for short duraon loan or lease.

Pyxis warrants that any labor services provided shall conform to the reasonable standards of technical com-

petency and performance eecve at the me of delivery. All service intervenons are to be reviewed and

authorized as correct and complete at the compleon of the service by a customer representave, or des-

ignate. Pyxis warrants these services for 30 days aer the authorizaon and will correct any qualifying

deciency in labor provided that the labor service deciency is exactly related to the originang event. No

other remedy, other than the provision of labor services, may be applicable.

Repair components (parts and materials), but not consumables, provided during a repair, or purchased

individually, are warranted for 90 days ex-works for materials and workmanship. In no event will the in-

corporaon of a warranted repair component into an instrument extend the whole instrument’s warranty

beyond its original term.

Warranty Shipping

A Repair Authorizaon (RA) Number must be obtained from Pyxis Technical Support before any product can

be returned to the factory. Pyxis will pay freight charges to ship replacement or repaired products to the

customer. The customer shall pay freight charges for returning products to Pyxis. Any product returned to

the factory without an RA number will be returned to the customer. To receive an RMA you can generate a

request on our website at hps://pyxis-lab.com/request-tech-support/.

Pyxis Technical Support

Contact Pyxis Technical Support at +1 (866) 203-8397, [email protected], or by lling out a request for

support at hps://pyxis-lab.com/request-tech-support/.

SP-710 User Manual [email protected] | +1 (866) 203-8397 2

1 Introducon

The Pyxis SP-710 is a handheld mulmeter that measures ve key parameters as well as colorimetric Free

and Total Chlorine. It is a cuvee-less device. Less than 5 mL water sample is needed to ll the two sample

cells for the measurement.

• PTSA (Pyrene Tetrasulfonic acid Tetra Sodium)

• Conducvity

• TMB Free and Total Chlorine

• Temperature

• pH

• ORP

1.1 Main Features

The SP-710 includes the following features:

• Breakthrough technology combining PTSA with conducvity and pH/ORP in a single rugged meter

• PTSA measurement uses custom signal processing algorithms to compensate for sample color and

turbidity interference

• Wireless and independent use of pH/ORP module

• Modular pH/ORP module design with extra-large juncon capacity providing increased service life

• Replaceable baery in pH/ORP module

• Easy replacement of the pH/ORP module without the need to disassemble the main module

• Customizaon and rmware upgrades via wireless connecon to uPyxis® Mobile/Desktop App

• Long baery life with 10,000+ readings

• Self-diagnosis during calibraons

SP-710 User Manual [email protected] | +1 (866) 203-8397 3

2 Specicaons

Table 1. SP-710 Specicaons

Item Specicaon*

Part Number (P/N) 50352

PTSA Range 0–300 ppb

PTSA Precision ±1% or ±1 ppb

Conducvity Range †1–15000 µS/cm

Conducvity Resoluon ±1% or ±1 µS/cm

TMB Free and Total Chlorine Range 0.02–2.2 ppm

TMB Free and Total Chlorine Resoluon ±0.01

Temperature Range 32–160 °F (0–71 °C)

Temperature Resoluon ±0.2 °F (±0.1 °C)

pH Range †0–14

pH Resoluon ±0.01

ORP Range ±1500 mV

ORP Resoluon ±1 mV

pH/ORP Module ‡Wireless and replaceable

Typical Main Module Sensor Life 5 years

Typical pH/ORP Module Sensor Life 1 year

Display Color LCD, visible under direct sunlight

Main Module Power Supply 4 AA alkaline baeries

pH/ORP Module Power Supply 1 ER14250 lithium thionyl chloride baery

Typical Baery Life 10,000 readings

Dimension (L ×W×H) 8.19 ×3.15 ×1.77 inch (208 ×80 ×45 mm)

Weight§1.15 lbs (520 g)

Operaonal Temperature 32–104 °F (0–40 °C)

Storage Temperature -4–140 °F (-10–50 °C)

Enclosure Rang IP67

Regulaon CE

*With Pyxis’s connuous improvement policy, these specicaons are subject to change without

noce.

†With Automac Temperature Compensaon (ATC)

‡Replacement recommended every 9–12 months

§Baeries excluded

3 Unpacking Instrument

Remove the instrument and accessories from the shipping container and inspect each item for any damage

that may have occurred during shipment. It is possible that the pH/ORP cell seal can open in shipment,

which may result in pH/ORP Storage Soluon on the outer shell of the device. This will not cause any

damage. Simply wipe down the device with wet cloth and towel dry. Verify that all items listed on the

packing slip are included. If any items are missing or damaged, please contact Pyxis Customer Service at

[email protected]. During shipping and storage aer producon, a sponge weed with the pH/ORP

Storage Soluon is placed in the pH/ORP cell seal. This sponge may be removed and discarded. Some

pH/ORP Storage Soluon may dry and form white crystals in the surrounding areas of the sample cells.

Please rinse the sample cells with a water sample before use.

SP-710 User Manual [email protected] | +1 (866) 203-8397 4

3.1 Standard Accessories

• Quick-Start Guide

• Four (4) AA alkaline baeries

• Pyxis pH/ORP Storage Soluon –– 70 mL P/N: 63900

• Bluetooth/USB Adapter for Desktop P/N: MA-NEB

• User Manual available online at hps://pyxis-lab.com/support/

3.2 Oponal Accessories

The following oponal accessories can be ordered from Pyxis Customer Service ([email protected]om) or

Pyxis E-Store at hps://pyxis-lab.com/shop/.

Table 2.

Accessory Name Part Number P/N

Replacement pH/ORP Module — Bluetooth 50315

Baery for pH/ORP Module 50778

Pyxis pH/ORP Storage Soluon –– 70 mL 63900

Pyxis Carrying Case for SP-710 50725

Pyxis 100 ppb PTSA + 1000 µS/cm (KCl) Combined Standard — 500 mL 21004

Pyxis 200 mV ORP Calibraon Standard –– 500 mL 57020

Pyxis pH 4-7-10 Calibraon Combinaon Kit –– 500 mL ea 57007

Pyxis 1000 µS/cm Conducvity Calibraon Standard –– 500 mL 57008

Pyxis TMB Free Chlorine Dropper Kit — 230 Tests 63901

Pyxis TMB Total Chlorine Dropper Kit — 230 Tests 63902

Pyxis TMB Chlorine Secondary Standard — 1.0 ppm Soluon — 125mL 21038

Pyxis Handheld Cleaning Kit SER-02

4 Installaon

4.1 Main Module Baery Installaon

The main module of the SP-710 is powered by four AA alkaline baeries. Typical baery life is 10,000 mea-

surements or 6 months. When the baery capacity is crically low, the SP-710 displays a ”LOW BATTERY”

warning for ve seconds and then automacally turns o.

The SP-710 does not turn itself on automacally aer the new baery installaon. To turn on the SP-710

aer new baery installaon, press the OK key momentarily and release.

The SP-710 has a calendar mer. To prevent the calendar from being reset to the default date and me

(01/01/1970, 00:00:00), install the four new baeries within four minutes aer the old baeries are re-

moved from the baery compartment. The SP-710 date and me is synchronized automacally when con-

nected with uPyxis® Mobile or Desktop App.

The SP-710 baery compartment, shown in Figure 1, is on the back side of the instrument. Baeries are

held in place by a cover secured with two Phillips-head screws.

SP-710 User Manual [email protected] | +1 (866) 203-8397 5

Figure 1. The SP-710 baery compartment

Use the following procedure to install new baeries:

1. Remove the baery compartment cover by loosening the two screws.

2. Remove the old baeries and dispose of them properly.

3. Following the posive and negave terminal signs in the compartment boom, snap four new AA

alkaline baeries rmly into the baery holder.

4. Replace the baery compartment cover and ensure that the sealing O-ring is lying at on the baery

holder.

5. Fasten the two screws.

*NOTE*Failure to properly seat the O-ring may result in water damage to the SP-710.

4.2 pH/ORP Module Baery Installaon

The new pH/ORP module has a lithium thionyl chloride baery (3.7V-ER14250) installed. When the bat-

tery capacity is crically low and the main module displays a LOW BATTERY warning, replace the ER14250

baery. Use the following procedure to install a new baery:

1. Unsnap the pH/ORP module from the top of the main module.

2. Remove the baery compartment cover by using a coin or at-head screwdriver to turn the cover

counterclockwise.

3. Remove the old baery and dispose of it properly.

4. Following the orientaon of the baery as shown in Figure 2, put a new ER14250 baery into the

compartment.

5. Fasten the compartment cover by turning it clockwise.

6. Snap the pH/ORP module back atop the main module.

*NOTE*Failure to properly fasten the cover may result in baery short-circuit and damage.

SP-710 User Manual [email protected] | +1 (866) 203-8397 6

Figure 2. Proper orientaon of the ER14250 baery

5 Instrument Overview

Figure 3.

SP-710 User Manual [email protected] | +1 (866) 203-8397 7

5.1 pH/ORP Cell Dual-Funcon Seal

The SP-710 pH/ORP rubber seal serves two purposes:

1. The seal contains a magnet which when opened to ush posion will power on the pH/ORP module.

2. When the SP-710 is in storage, the seal maintains a moist environment for the electrodes.

For vigorous eld use, it is recommended to ulize a rubber-band to secure the pH/ORP Cell Dual-Funcon

Seal to prevent loss of pH/ORP Storage Soluon. The sponge soaked with the pH/ORP Storage Soluon in

the pH/ORP Cell Dual-Funcon Seal helps prolong the life of the pH/ORP module. It may be discarded if

desired, but pH/ORP Storage Soluon must be maintained in the unit cell at all mes during non-use. Please

ll the pH/ORP cell with 1 mL of Pyxis pH/ORP Storage Soluon (P/N: 63900) at all mes when not using

the pH/ORP cell.

Figure 4. pH/ORP Cell Dual-Funcon Seal in the open posion

5.2 Control Keys

The SP-710 has three control keys, as shown in Figure 3. The le ( ), right ( ), and ok ( ) keys

are used to launch acons indicated on the LCD display directly above the keys. The labels above the keys

indicate the funcon associated with each key and funcons can be changed in dierent operaon modes.

*NOTE*The LCD display is not a touch-enabled device.

5.3 Main Module On/O

To turn on the SP-710: Press momentarily and release.

To turn o the SP-710: Press and hold for about three seconds. Release when the LCD display

turns o. The SP-710 turns itself o aer 30 seconds without user interacon detected. This is done to

conserve baery life.

*NOTE*This auto-me o seng may be customized by the user as desired through the

uPyxis® Mobile or Desktop App.

SP-710 User Manual [email protected] | +1 (866) 203-8397 8

5.4 pH/ORP Module On/O

The module is turned on by rotang the pH/ORP cell seal to touch the front face of the module as seen in

Figure 5. A sealed magnet within the rubber seal will trigger the module power circuit. The pH/ORP module

will turn itself o when either commanded by the main module or automacally based on the default or

customized idle me limit seng. The purpose for this design is to extend baery life.

If pH/ORP measurement is not needed, the module does not need to be turned on.

Figure 5.

6 Measurement

6.1 PTSA and Conducvity Measurement

6.1.1 Measurement Procedure

When powered on, the SP-710 will default to the PTSA and conducvity measurement mode. The water

sample can be transferred to the main module sample cell using a pipee or lled directly from a faucet,

sample bole, or sample valve.

*NOTE*Special care should be taken when pouring the sample into the cell to avoid air

bubble entrainment, which can interfere with reading accuracy.

Before beginning a measurement, use the sample water to rinse the main module sample cell at least three

mes. Allow 5–10 seconds for the SP-710 to stabilize. The values will be displayed in white with a blue background

if a stable value is reached (Figure 6). For a sample with conducvity in the range of 100 to 6000 µS/cm,

the measured value should be stabilized in the range of 98–102 to 5940–6060 µS/cm, respecvely. For a

sample containing 100 ppb PTSA, the measured PTSA should be stabilized within the range of 98–102 ppb.

*NOTE*The me required to reach a stable reading may be slightly longer if the water

sample temperature is signicantly dierent than the environmental temperature at which

the SP-710 had been equilibrated (stored).

SP-710 User Manual [email protected] | +1 (866) 203-8397 9

Figure 6.

6.1.2 Temperature Compensaon

The displayed conducvity value is automacally compensated to the nominal value at the reference tem-

perature 25 °C using the sample temperature measured. The commonly used linear correcon equaon is

used:

Conductivity at 25 °C=Conductivity at Tmeasured

1 + 0.02(Tmeasured –25) (1)

where Tmeasured is the sample temperature in °C.

6.1.3 High Color and Turbidity Warning

The SP-710 has extra channels to measure sample turbidity and color to automacally compensate sam-

ple color and turbidity interference. If sample turbidity and color values determined are too high, a PTSA

measurement warning will be displayed. In such a case, the user should lter the sample for PTSA mea-

surement.

6.2 TMB Free and Total Chlorine Measurement

The SP-710 oers Free and Total chlorine methods based on the USEPA-accepted tetramethylbenzidine

(TMB) chemistry. Pyxis also oers Free and Total chlorine reagent in a 30 mL, easy-to-use dropper bole

which is sucient for up to 230 individual tests. This unique liquid reagent contains the TMB reagent for

free or total chlorine, a pH buer, and a polymeric binder. See the Oponal Accessories secon for ordering

details. When three drops of these liquid reagents are administered into the sample cell of the SP-710, the

TMB reagent rapidly reacts with free or total chlorine present to develop a stable, yellow-colored soluon.

The SP-710 measures the absorbance value of the resulted yellow soluon to determine the free or total

chlorine concentraon.

SP-710 User Manual [email protected] | +1 (866) 203-8397 10

6.2.1 Measurement Procedure

Follow the steps below to measure free and total chlorine:

1. Power on the SP-710 by pressing . Allow 5–10 seconds for the SP-710 to stabilize.

2. Press Measure () as needed to highlight Chlorine in the selecon menu.

3. Press to launch the CHLORINE MEASUREMENT screen (Figure 7).

4. Rinse the main module sample cell three mes with the sample to be tested. Fill the sample cell with

the sample.

5. Press Zero (). ZERO will then appear on the top-le corner of the display (Figure 8).

6. Prepare the developed sample:

(a) Add 3 drops of Free or Total Chlorine reagent into the sample cell (Figure 9).

(b) Draw out the sample water and reagent from the sample cell using the disposable pipee to

provide mixing.

sample back into the sample cell allowing the reagent to fully dissolve. A yellow color should

develop if chlorine is present.

7. Press Timer (). A 2-minute mer will begin.

8. The SP-710 will connuously display the free or total chlorine concentraon as the mer counts down

(Figure 10). If the real-me readings remain steady, press Stop ( ) to stop measurement mer

early or wait for the 2-minute mer to end.

9. Record the nal value as ppm Free or Total Chlorine.

Figure 7. Figure 8.

SP-710 User Manual [email protected] | +1 (866) 203-8397 11

Figure 9. Figure 10.

6.3 Temperature Measurement

The SP-710 has two planum RTDs located in the main module sample cell and the pH/ORP sample cell.

The temperature sensors are individually calibrated in the factory and do not need to be calibrated during

use. The temperature values measured are used in the conducvity temperature compensaon and in

converng the measured cell potenal to the pH value at the sample temperature.

6.4 pH/ORP Measurement

6.4.1 Measurement Procedure

Follow the steps below to measure pH and ORP:

1. Rotate the pH/ORP cell seal to touch the front face of the module as seen in Figure 5. This is to power

on the module. The indicator light of the module will be green and ashing when powered on. Aer

the module is turned on, the seal can be posioned anywhere desired.

*NOTE*If the module baery capacity is low, the indicator light will ash red .

2. Press Measure ( ) as needed to highlight pH/ORP in the selecon menu.

3. Press to launch the pH/ORP MEASUREMENT screen.

4. The main module of the SP-710 will automacally connect aer the pH/ORP module has been pow-

ered up.

5. Rinse the pH/ORP sample cell three mes with the sample to be tested. Fill the sample cell with the

sample.

6. The pH and ORP values will be updated every two seconds on the SP-710 main module display. The

values will be displayed in white with a blue background once a stable value is reached (Figure 11).

*NOTE*If the pH/ORP module powers o or was not powered on to begin with (see

step 1) an instrucon message will be promoted on the screen showing how to turn

on the pH/ORP module (Figure 12).

SP-710 User Manual [email protected] | +1 (866) 203-8397 12

Figure 11. Figure 12.

6.4.2 Erroneous Values

An erroneous pH value could be obtained if the module has been stored dry without the protecon of

pH/ORP Storage Soluon for a long period of me. In this case, please ll the module cell with pH/ORP

Storage Soluon to wet the electrode and allow it to soak for 30 minutes before use. If the pH/ORP Storage

Soluon is not available, please use the sample water to hydrate the electrode for at least 30 minutes.

6.4.3 pH Measurement Principle

The SP-710 pH/ORP module uses the standard electrochemical cell for the pH measurement. The cell con-

sists of a glass electrode and an Ag/AgCl reference electrode. Potassium chloride (KCl) electrolyte lling gel

is sealed in the Ag/AgCl electrode. The amount of reference electrolyte in the pH/ORP module is signi-

cantly larger than that used in a common laboratory pH electrode. This reduces the chance of the lling

soluon being diluted or contaminated and increases the electrode life.

The pH value is calculated from the measured cell potenal (EMF in mV):

pH =EMF

S(T) + pHo

(2)

S(T) = 0.1986(T+ 273.15) (3)

S(T)in the above equaon is the calibraon slope, where Tis temperature in degrees Celsius. S(T)has

a theorecal value of 59.17 mV at 25 °C. pHois the calibraon intercept. The calibraon slope, S(T), at

the nominal temperature 25 °C and the intercept, pHo, are determined in the two-point or three-point

calibraon procedure. pHois determined as well in the singe-point pH 7.00 calibraon. The temperature

value measured by the pH/ORP module is used in the above equaon to calculate the pH value at the sample

temperature.

*NOTE*The temperature compensaon involved in the pH value calculaon is quite dif-

ferent from that in the conducvity measurement. The temperature-compensated conduc-

vity value is a would-be value at the reference temperature 25 °C, while the pH value

displayed by the SP-710 is the true pH value at the sample temperature.

SP-710 User Manual [email protected] | +1 (866) 203-8397 13

6.4.4 ORP Measurement Principle

The SP-710 measures the sample ORP with the planum electrode and the Ag/AgCl reference electrode in

the pH/ORP cell. The pH measurement and the ORP measurement share the same reference electrode.

Reporng an ORP value without specifying the reference scale has no meaning. The value displayed by

the SP-710 depends on the ORP value of the ORP standard used in the calibraon. If the ORP value of the

standard is referenced to the Standard Hydrogen Electrode (SHE), the ORP value reported by the SP-710 is

SHE-based, i.e., in the unit of Eh. If the ORP value of the standard is referenced to the Ag/AgCl (3M KCl)

electrode, the ORP value reported by the SP-710 is referenced to the same, commonly noted as (Ag/AgCl,

3M KCl).

The ORP electrode is calibrated using the Zobell’s standard using the value of 221 mV at 25 °C before ship-

ping. The default ORP scale of the SP-710 before a user calibraon is the Ag/AgCl (3M KCl). If the SP-710

is exposed to an extremely high (> +600 mV) or extremely low (< -200 mV) ORP sample, rinsing the pH/ORP

cell excessively when switching to measure a lower or higher redox buer capacity sample is necessary. The

dissolved oxygen in the sample can contribute to the ORP value measured. To measure a sample that has

not be equilibrated with the ambient air, a slow and small upward driing to more posive ORP value is

normal. For a typical cooling water sample treated with oxidizing biocides, a ±20 mV accuracy and ±10 mV

precision can be expected.

SP-710 User Manual [email protected] | +1 (866) 203-8397 14

7 Calibraon

7.1 PTSA Calibraon (Two-Point with Zero)

1. Rinse the main module sample cell three mes with DI water. Fill the sample cell with DI water.

*NOTE*In emergency, “non-PTSA” water, such as city water, may be used, but re-

calibrate using DI water for the zero step as soon as it is available.

2. Power on the SP-710 by pressing . Allow 5–10 seconds for the SP-710 to stabilize.

3. The unit is acvely reading and displaying both PTSA and Conducvity. The values will be very low if

DI water is used; conducvity value is not crical but PTSA value should be near zero. A low non-zero

value (e.g. 0.2 or 0.4, etc.) is not problemac.

4. Press Calib () as needed to highlight PTSA in the selecon menu.

5. Press to launch the PTSA CALIBRATION screen (Figure 13).

6. Press Zero () to start the zero (blank) calibraon.

7. If the calibraon succeeds, a checkmark ( ) and instrucons for the slope calibraon will appear

(Figure 14).

8. Rinse the main module sample cell three mes with the desired PTSA standard. Fill the sample cell

with the desired PTSA standard.

9. Press Cycle () to cycle between the PTSA standards 100, 200, and 300 ppb (it repeats). Ensure

the value selected matches the desired PSTA standard in the sample cell.

10. Press Slope () to start the slope calibraon.

11. If the calibraon succeeds, a checkmark ( ), a ”Calibraon Success” message will appear (Figure

15). Otherwise, a warning message is displayed.

12. Calibraon is now complete. Press Exit () to return to measurement mode.

*NOTE*If Exit is pressed before the second checkmark appears, the calibraon will

not be completed and must be re-done.

Figure 13. Figure 14. Figure 15.

SP-710 User Manual [email protected] | +1 (866) 203-8397 15

7.2 Combined PTSA and Conducvity Calibraon

The following steps will calibrate both conducvity at 1000 µS/cm and PTSA at 100 ppb using Pyxis 100 ppb

PTSA + 1000 µS/cm (KCl) Combined Standard (P/N: 21004):

1. Rinse the main module sample cell three mes with the Combined Standard. Fill the sample cell with

the Combined Standard.

2. Power on the SP-710 by pressing . Allow 5–10 seconds for the SP-710 to stabilize.

3. Press Calib () as needed to highlight Cond in the selecon menu.

4. Press to launch the COMBINED CALIBRATION screen (Figure 16).

5. Press Calib () to conrm the desired calibraon.

6. The display updates as shown in Figure 17 and the user can choose one of three opons:

(a) Press to start the calibraon, or

(b) Press Cancel () to return to the COMBINED CALIBRATION screen, or

7. Once calibraon begins, the SP-710 reads the sample and displays the value in the Measured secon.

A slight variance from the target is acceptable.

8. If successful, a checkmark ( ) will appear next to the conducvity measurement.

9. Aer a second, another checkmark ( ) will appear next to the PTSA measurement.

10. Finally, the message “Calibraon Success” will appear towards the boom of the display (Figure 18).

11. Calibraon is now complete, long press Calib ( ) to return to measurement mode.

Figure 16. Figure 17. Figure 18.

SP-710 User Manual [email protected] | +1 (866) 203-8397 16

7.3 Conducvity Calibraon

7.3.1 Conducvity Calibraon (500, 1000, 2500, or 5000 µS/cm)

1. Rinse the main module sample cell three mes with the desired conducvity standard. Fill the sample

cell with the desired conducvity standard.

2. Power on the SP-710 by pressing . Allow 5–10 seconds for the SP-710 to stabilize.

3. Press Calib () as needed to highlight Cond in the selecon menu.

4. Press to launch the COMBINED CALIBRATION screen.

5. Press ( ) to launch the CONDUCTIVITY CALIBRATION screen.

6. Use ( ) and ( ) to cycle to the desired calibraon. The standard conducvity selecons are

500, 1000, 2500, or 5000 µS/cm. For other conducvity values, see the User-Dened Conducvity

Calibraon secon.

*NOTE*To exit the calibraon procedure enrely, long press Calib ()

7. Press Calib () to conrm the specic conducvity calibraon desired.

8. The display updates as shown in Figure 19 and the user can choose one of three opons:

(a) Press to start the calibraon, or

(b) Press Cancel () to return to the CONDUCTIVITY CALIBRATION screen, or

9. Once calibraon begins, the SP-710 reads the sample and displays the value in the Measured secon.

A slight variance from the target is acceptable.

10. The message “Calibraon Success” will appear towards the boom of the display (Figure 20).

11. Calibraon is now complete, long press Calib ( ) to return to measurement mode.

Figure 19. Figure 20.

SP-710 User Manual [email protected] | +1 (866) 203-8397 17

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Pyxis SP-710 User manual

Brand: Pyxis

Model: SP-710

Category: Measuring, testing & control

Type: User manual

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Pyxis SP-710 User manual

Pyxis SP-710 User manual

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